She had a great time explaining her dark side in "Maleficent." That's Disney's new twist on "Sleeping beauty." It opens up tomorrow. And we talked about her costume to what she thinks about her kids following her into acting. Take a look. Before the sun sets on her 16th birthday, she will fall into a sleep like death. Reporter: The spinning wheel, the finger prick, the sleeping maiden. This isn't your mother's "Sleeping beauty. ""Maleficent" is a new take on an old classic. Is it true? You're maleficent? Reporter: A dark movie. You go towards the edge of camp. And she's such a complicated character. Curious little beastie. Reporter: Used to having cartoon character, good, bad, black, white. In this case, she was a little bit of everything. What was the part of her you wanted to bring out that hasn't been seen before? How do you tell a story about or make anybody care about a character that curses a baby. The worst thing you could probably do. What could possibly make a person, a woman, do this to a child? There is evil in this world. Reporter: I brought out my own to the movie. I had four girls, two of my own and two friends. They had big questions. They were fascinated by it. How did you get into that costume? How hard was it? I had to take it very slowly. The first time I got into it, I had two different sets of horns. I had horns I could pop off because I kept banging them into things. When they were wrapped in leather, I couldn't. I was this 7 1/2-foot-tall thing, with my staph. And I kept getting my staph caught in my cloak. It all went terribly wrong. Well, well. Reporter: They thought it hurt to do your cheeks. That's so sweet. It didn't hurt. It was glue. Such great makeup artists. Reporter: They were also fascinated that your daughter was in the movie. They want to know, did she know she was acting? Yes, she did. Reporter: She did? Yeah. She knows what mommy and daddy do for a living. The first day she acted was when she had to catch the butterfly. And I wasn't in the scene with her. And I think that was more complicated. Disney told us, it's the funniest dailies they've ever seen because it's me and brad jumping around. And I'm holding the ball and trying to get her to follow me. And he's on the cliff, trying to get her to jump into his arms. We're singing. It was hard work. Reporter: I know you said you didn't want your children to be actors. Do you think you can stop it? You can't stop your kids from everything. The creative side is wonderful. The public side of it is not something we wish for them. Reporter: You mention the public side. It seems from afar, that you're kind of at peace, now, with the level of privacy or lack of privacy that you have. Is that true? You do some things that are fun. And you can also shed light on really serious issues and things that you really care about. And that's the most wonderful side of being public. And you can do some good. For that, I think I found the balance in a purpose for it all. And "Maleficent" is said set to hit theaters next Friday.

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